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Tuesday, July 28, 2015

Scientists mission OSIRIS-REx hope to find organic asteroid Bennu

In September 2016, NASA
plans to launch a spacecraft returned to study the asteroid. This mission will
help scientists better understand the composition of asteroids, their origins
aspacecraftnd perhaps even the origin of the Earth. The mission OSIRIS-REx
(Origins-Spectral Interpretation-Resource Identification-Security-Regolith
Explorer) will allow lifting the veil of secrecy over the history of the
formation of the Sun and planets.

The spacecraft will be equipped with
scientific instruments to map the near-Earth asteroid Bennu and detection of
minerals and organic compounds, which may indicate of microbial life. It is
planned that the probe reaches its target in 2018, and return the samples to
Earth in 2023. It will take at least 2.1 ounces of samples for study. One of
the tools spacecraft spectrometer OVIRS (OSIRIS-REx Visible and Infrared
Spectrometer) is designed to measure the visible and near-infrared light
emitted by an asteroid that will determine which chemical substances are
present in the space object.

Dante Lauretta, principal investigator for the
mission at the University of Arizona, as well as other members of the team are
convinced that the spectrograph OSIRIS-REX be discovered asteroid Bennu organic
material. The carbon rich asteroid Bennu keeps a record of the early history of
our solar system, how its composition is likely to remain unchanged from the
time it was formed about four billion years ago. On this site may contain
natural resources such as water, organic and precious metals. Does this mean
that the asteroid Bennu can be detected and primitive forms of life? Dante
Lauretta debunks this proposal. He believes that the probability of finding
life in such a harsh environment of space is negligible. "We are confident
that there is no Bennu microbial life. The body size of Bennu, is too small and
the atmosphere of gravity in order to protect any known form of life from the
ravages of space "- says Loretta.

To the picture of chemical substances
present on the asteroid was more accurate, the tool will degrade light OVIRS
asteroid like prism which decomposes the solar rays into color components, but
in a much wider range of wavelengths. For different chemical characteristic
unique spectral signature that can be identified in the reflected spectrum.

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